/Engine/Source/Editor/UnrealEd/Public/Commandlets/AssetRegistryGenerator.h
ContainsMap Does this package contain a map file (determined by finding if this package contains aUWorld/ULevelobject)
return if the package contains aUWorld/ULevelobject (contains a map)
bool ContainsMap ( const [FName](API\Runtime\Core\UObject\FName) & PackageName ) const